Well there you go, if it was just this Sunday past that the missus and I wondered how our two spare change receptacles in the car had ended up completely empty.
I figured one or both of us had forgotten that we'd used them up and not replenished - maybe it was this dastardly lot!
Low returns yes but near untraceable, and if they sweep whole streets at a time..
EDIT: my colleague says these devices are readily available on eBay, time to clear the car of anything vaguely valuable..